#pragma once

#include<iostream>
#include<vector>
#include<string>
#include<sys/types.h>
#include<sys/socket.h>
#include<functional>
#include"InetAddr.hpp"
#include"ThreadPool.hpp"
#include"LockGuard.hpp"

using task_t = std::function<void()>;

class MessageRoute
{
    private:

    bool IsExists(const InetAddr &addr)
    {
        for(auto a:_online_user)
        {
            if(a==addr)
            {
                return true;
            }
        }
        return false;
    }

    public:
    MessageRoute()
    {
        pthread_mutex_init(&_mutex, nullptr);
    }

    void AddUser(const InetAddr &addr)
    {
        LockGuard lockguard(&_mutex);
        if(IsExists(addr))
        {return;}
        _online_user.push_back(addr);
    }

    void DelUser(const InetAddr &addr)
    {
        LockGuard lockguard(&_mutex);
        for(auto iter=_online_user.begin();iter!=_online_user.end();iter++)
        {
            if(*iter==addr)
            {
                _online_user.erase(iter);
                break;
            }
        }
    }

    void RouteHelper(int sockfd, std::string message, InetAddr who)
    {
        LockGuard lockguard(&_mutex);
        for(auto u: _online_user)
        {
            std::string send_message="\n[+"+who.Ip()+":"+std::to_string(who.Port())+"]#"+message+"\n";
            struct sockaddr_in clientaddr=u.Addr();
            ::sendto(sockfd,send_message.c_str(),send_message.size(),0,(struct sockaddr*)&clientaddr,sizeof(clientaddr));
        }
    }

    void Route(int sockfd, std::string message, InetAddr who)
    {
        // 1. 我们任务，用户首次发消息，不光光是发消息，还要将自己，插入到在线用户中！
        AddUser(who);

        // 1.1 如果客户端要退出
        if (message == "Q" || message == "QUIT")
        {
            DelUser(who);
        }

        // 2. 构建任务对象，入队列，让线程池进行转发
        task_t t = std::bind(&MessageRoute::RouteHelper, this, sockfd, message, who);
        ThreadPool<task_t>::GetInstance()->Enqueue(t);
    }
    ~MessageRoute()
    {
        pthread_mutex_destroy(&_mutex);
    }
    private:
    std::vector<InetAddr> _online_user;
    pthread_mutex_t _mutex;
};